Just an anecdote; I had an RX-7 with charging issues that I didn't drive often, living on an island, and having a Mazda 323, a scooter, and 250 Honda Rebel motorcycle that could do 85 with my girlfriend on it. I got good at starting the RX-7 by sitting in the driver's seat, and pushing it backward with my left leg, and push starting it in reverse. My left leg got strong!